1 (* Copyright (C) 2002, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
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8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
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15 * GNU General Public License for more details.
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23 * http://cs.unibo.it/helm/.
27 current proof (proof uri * metas * (in)complete proof * term to be prooved)
29 type proof = UriManager.uri option * Cic.metasenv * Cic.term * Cic.term
30 (** current goal, integer index *)
32 type status = proof * goal
34 let initial_status ty metasenv =
35 let rec aux max = function
37 | (idx, _, _) :: tl ->
43 let newmeta_idx = aux 0 metasenv in
45 None, (newmeta_idx, [], ty) :: metasenv, Cic.Meta (newmeta_idx, []), ty
50 a tactic: make a transition from one status to another one or, usually,
51 raise a "Fail" (@see Fail) exception in case of failure
53 (** an unfinished proof with the optional current goal *)
54 type tactic = status -> proof * goal list
56 (** creates an opaque tactic from a status->proof*goal list function *)
60 exception Fail of string
63 calls the opaque tactic on the status, restoring the original
64 universe graph if the tactic Fails
66 let apply_tactic t status =
69 (** constraint: the returned value will always be constructed by Cic.Name **)
70 type mk_fresh_name_type =
71 Cic.metasenv -> Cic.context -> Cic.name -> typ:Cic.term -> Cic.name